Curated OER
Respiratory, Circulatory, and Urogenital Systems in the Rat
Here is a lesson which describes a lab activity in which a rat is dissected, and its heart is studied. The lesson has ample background information about three of the rats internal systems, and excellent lab sheets that support the...
NOAA
Individual Species in the Deep Sea
A tube worm's outer covering is made of chitin, the same material that makes up the shells of lobsters and crabs. Scholars create tube worms and analyze and discuss the longevity of organisms living near cold seeps. They then discuss and...